Valve-gearing.



No. 679,992. Patented Aug. 6, I90l. W. 6. RICE.

VALVE GEAR'ING. Ann c nfilodA g 29 1599 (lo Model.)

INVENTOR:

WITNESSES: 5 M 6 IV/AL/IIM 6 (/05; v 9M2; 5 V

UNITED STATES PATENT QFFI E.

IVILLIAM G. RICE, OF PHILADELPHIA, PENNSYLVANIA.

VALVE-GIEARING.

SPECIFICATION forming part of Letters Eatent No. 679,992, dated August 6, 1901.

Application filed August 29, 1899; Serial No- 728,836. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM G. RICE, of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Valve-Gearing, whereof the following is a specification, reference being had to the accompanying drawings.

. My invention relates to gearing connective with a governor and a throttle-valve of a steam-engine whereby in the event of the failure of the governor to operate said throttle-valve shall be automatically closed.

It is the object of my invention to provide simple and efficient means to effect the aforesaid result, so arranged as to be conveniently applicable to engines already erected.

My invention also comprehends means whereby my valve-gearing, which is ordinarily automatic in its operation, may be otherwise actuated at the will of the operator.

In the accompanying drawings, Figure 1 is a side elevation of a steam-engine with a convenient embodiment of my invention applied thereto. Fig. 2 shows a detail 'of construction of the valve-gearing.

In said figures, A is the steam-engine, provided with a steam-supply pipe A, in which is the throttle-valve B. The governor O is of the type wherein the weight 0 is caused to rise and fall in accordance with the speed of rotation of the shaft 0', upon which it is mounted, said shaft 0' being actuated in the usual manner by the belted connection 0 and said parts being so arranged that the arm (1 of the lever D is depressed, as shown in full lines in the drawings, during the normal oploar F engages the lever H, which is pivotally mounted at h in the bracket H, and in said position the horizontal arm of the lever H is arranged to uphold the weight I, from which the cord or chain J extends around sheaves ,j to the drum B, fixed upon the throttlevalve B.

The arrangement of the parts above de' scribed is such that upon failure of the governor C to operate and the consequent movement of the lever-arm d to the position shown in dotted lines in Fig. 1 the slide-bar F will be disengaged from the lever H, which being then free to rotate on its pivot h permits the weight I to fall to the position shown in dotted lines in said figure, and thus rotate the drum B in the direction of the arrow and close the valve B.

As a convenient adjunct to the parts above described, whereby the operation of the valve B is automatically eifected, I prefer to provide means whereby said valve may be operated at the will of the operator stationed at a distance therefrom. For this purpose an additional cord or chain E may be connected with the cord or chain E and extended to any desired point, so that traction upon the same will uplift the slide-bar F and free the weight I, with the result above described. I prefer, however, to provide means to operate the slide-bar F and release the weight I electrically, as follows: As shown in Fig. 1, the solenoid K is provided with wiring connections 7c in circuit with a source of electrical energy, such as a battery K, and provided with a normally open switch K Said solenoid K is so arranged with respect to the slide-bar F that the establishment of the electric circuit through said solenoid by closure of the switch K suffices to uplift the slidebar F and release the lever H and weight I to efiect the closure of the valve B, as aforesaid.

A greater range of movement of the slide- -bar F may be secured from a given movement of the lever-arm d 'by the differential sheaves shown in Fig. 2, wherein the cord'or chain E leading directly from the actuatinglever d, is secured upon the smaller sheave e and the cord E leading to the slide-bar, is secured upon the larger sheave e Said two sheaves being relatively fixed, it is ob vious that a given movement of the cord E will effect a greater movement of the cord E It is to be noted that the sheave B may be conveniently secured upon the stem of the ternal valves of the engine, so that connection may be. conveniently made to said Ver in the manner I have illustrated. It is to be understood, however, that connection may be made to any other portion of the govmeans in cooperative relation with said auernor which will suffice to give motion to the cord E. Therefore I do not desire to limit myself to the precise construction and arrangement of' the parts which I have shown and described, as it is obvious that various modifications maybe made without departing from the essential features of my invention.

I claim 1. In valve-gearing for an engine, the combination with a movable member of the engine -governor and a throttle valve in the main supply-pipe of'the engine, of mechanism arranged to close said valve, means to normally detain said valve-closing mechanism, mechanism physically connectingsaid governor member and said detent, arranged to automatically release said valve-closin g mechanism,whenever:said governor ceases to operate, and an electric circuit, comprising tomatic mechanism, arranged to effect the release of said valve closing mechanism at when said governor ceases to operate, and

thereby permit the closure of said valve B, solely by the gravitation of said weight I, substantially as set forth.

3. In valve-gearing for an engine, the combination with the lever D, operatively connected with the engine-governor O; of the arm d, upon said lever D; the detent F; the flexible connector E, extending from said arm 01, to said detent F; the lever H, normally engaged by said detent F, and arranged to support the weight I; the throttlevalve B, in the main supply-pipe of the engine, provided with the rotatable valve-stem b; the drum B, fixed upon said valve-stem b; and the flexible connector J, extending from said weight I, in operative engagement with said drum B, substantially as set forth.

4:. In valve-gearing for an engine, the combination with the lever D, operatively connected with the engine governor O; of the detent F; a flexible connector extending from said lever D, to the differential sheave e 6 a flexible connector extending from said sheave to said detent F; the lever H, normally engaged by said detent F, and arranged to support the weight I; the throttle-valve B, in the main supply-pipe of the engine provided with the rotatable valvestem 1); the drum B, fixed upon said valvestem b; and the flexible connector J, extending fromsaid Weight I, in operative engagement with said drum B, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' WILLIAM G. RIOE.

Witnesses:

HENRY N. CONARD, ARTHUR H. PAIGE. 

